Learn how to write a formal leave letter to your class teacher for various reasons, such as illness, family emergency, or personal matter. See sample formats, templates, and tips for writing a leave letter . Leave Letter to Class Teacher : A leave letter to a class teacher is a written communication by a student’s parent or guardian to inform the teacher about their child’s absence from school for a particular period. The reasons for absence could be due to illness, personal reasons, or a family emergency. It is essential to write a leave letter to class teacher so that they are aware of the situation and can make appropriate arrangements to help the student catch up on any missed work. Learn how to write a leave letter to your class teacher for various reasons, such as illness, death, or injury. See examples of leave letters in MS Word format and download them for free. Leave Letter to Teacher : A leave letter to teacher is a formal written communication addressed to the teacher or the school authorities, informing them about a student’s absence from school. The Leave Letter to Teacher is usually written by a student’s parent or guardian, or in some cases, by the student themselves, if they are of an appropriate age.